Background
The TR4a, built from 1965 until 1967, was a development of the existing Micholetti styled TR4, gaining independent trailing arm and coil spring rear suspension and a stiffer chassis, giving a better ride comfort. It used the same 4 cylinder 2.2 but changes to the head meant it gained around 10% more power at 104 bhp and 179 Nm. We should mention that the early US cars were supplied without the independent rear suspension as Triumph corporation, California required a live axle layout.
The ‘Surrey Top’ semi open top option was also carried over from the TR4 and is now a rare and desirable thing to find.







